Machine-gun.



A. A. K. HEINEMANN.

MACHINE GUN.

APPLICATION FlLED FEB. 25, 1914.

Patented Jan 11, 1916.

fave nib? 17m rite/S Winesses:

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barren sited-Es Parana; GFIE AUGUST ALBERT KAIRL HEINEIVIANN, OF BERLIN, GERMANY, ASSIGNOB TO DEUTSCHE VTAFFEN- UNI) MUNITIONSFABRIKEN, OF BERLIN. GERMANY.

MACHINE-GUN.

Application filed February 25, 1914.

To all whom it may concern:

Be it known that 1, AUGUST ALBERT KARL HEINEMANN, a citizen of the German Empire, residing at Berlin, in the German Empire, have invented certain new and useful Improvements in Machine-Guns, of which the following is a specification.

The present invention relates to machine guns, more particularly to stocks of SLlCl'l guns, and refers to improvements in the arrangement and attachment of the stock to the receiver of the gun.

\Vith this end in view my invention consists in certain novel features of construction and combinations of parts, as will be hereinafter fully described and pointed out in the claims with reference to the accompanying sheet of drawing in which I have shown, by Way of example, a longitudinal elevation, partly in section, of a hand machine gun constructed in accordance with and embodying my invention.

Similar letters and numerals of reference refer to similar parts.

The receiver C of the gun has a rear tubular projection 20 which may contain the recoil spring m. The stock 7' having a longitudinal perforation 21 is placed upon the said projection and firmly held in position thereon and against the rear plate C of the receiver C by means of a sleeve-like screw 22 inserted from the rear into the perforation 21 and screwed into the end of the projection 20. This tubular screw 2-2 has at its rear end a flange 23 let into a recess in the butt end of the stock. This recess is covered by the customary butt-plate 24:. The stock j is so constructed and formed that when connected with the receiver of the gun, the end face of the butt is located in the direction of the axis of the bore of the barrel. The recoil pressure of the gun will therefore act in a central direction upon the shoulder of the gunner. If preferred, the screw 22 may have an internal thread which will engage with an external thread of the projection 20.

In order to prevent the stock 7' turning about the projection 20 the rear plate C of the receiver C is provided with one or more dowels 25 which enter into holes in an end Specification of Letters Patent.

Patented J an. 11, 1916.

Serial No. 820,805.

plate 26 mounted on the front face of the stock.

In the new hand machine-gun the trigger mechanism is actuated by means of a trigger 27 protected by a guard 27 In order that the hand may have a suitable support or rest, when pulling the trigger, a separate handle or grip 28 is mounted on the stock j, so that when shooting the hand does not grasp the neck or thin end of the stock. as is usual with muskets, but the grip 28.

The subject'matters of invention shown and described herein but not claimed. form the subject-matters of my prior application SP1. No. 7834-71, filed Aug. 7th 1913 and two other contemporary divisional applications.

I claim:

1. In a machine gun, the combination of a receiver, a screw threaded tubular projection extending from the rear wall thereof and communicating with the receiver, a recoil spring extending into said projection, adjusting means located in said projection for adjusting said recoil spring, a stock having a longitudinal perforation adapted to fit over said projection, and a tubular screw member arranged to be inserted from the butt end of the stock into said perforation and adapted for screw threaded connection with said projection whereby said stock and receiver are clamped together and access is had to said adjusting means.

2. In a machine gun, the combination of a receiver, a screw threaded tubular projection extending from the rear wall thereof and communicating with the receiver, said projection being in substantial axial alinement with the bore of the gun barrel and having its internal diameter substantially constant throughout, a recoil spring extending into said projection, adjusting means located in said projection for adjusting said recoil spring, a stock having a longitudinal perforation adapted to fit over said projection and provided in its one end face with recesses, dowels projecting from said receiver into said recesses whereby rotation of said stock on said projection is prevented, a tubular screw member arranged to be inserted from the butt end of the stock into ing downwardly from said stock adjacent to the trigger of the gun. 7

AUGUST ALBERT KARL HEINEMANN.

Witnesses WVOLDEMAR HAUPT, HENRY HASPER.

said perforation and adapted for screw threaded connection with said projection whereby said stock and receiver are clamped together and access is had to said adjusting means, a butt-plate detachably secured to the butt end of the stock and covering said recess and screw member and a' grip project- Gopies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

